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多年来,水稻秧龄是以天数多少来衡量的,但在早春气温多变的情况下育早稻秧,天数的多少并不能准确地反映适龄秧龄,在不同年度间、不同气温下,作为秧龄预定指标的天数表现出的结果不一样,有的年度尚未达到预定的天数却已超龄早穗(秀);有的年度超过了预定天数,仍能获得高产。我们自1974年以来,对早稻的秧龄问题进行了一些研究,初步看出,以叶龄作为适龄的主要诊断指标,天数作参考,是比较合乎科学道理的。
Over the years, the seedling age of rice is measured by the number of days. However, the number of days of growing early rice seedlings does not accurately reflect age-appropriate seedling age when the temperature fluctuates in early spring, and as a predetermined indicator of seedling age at different years and at different temperatures The number of days showed different results, some of the year has not yet reached the scheduled number of days has been exceeded the ear early (show); some annual exceeds the scheduled number of days, can still get high yield. Since 1974, we have conducted some researches on the issue of the seedling age of early rice. It is initially concluded that it is more scientific to take the leaf age as the main diagnostic indicator of age and the number of days for reference.